Charging control apparatus and method, charging system, correlation method, and computer program

ABSTRACT

A charging control apparatus ( 310 ) controls wireless charging between one charging apparatus ( 10 ) and a vehicle ( 20 ) which communicates with the one charging apparatus via a communication relay apparatus ( 30 ). The charging control apparatus is provided with: an outputting device ( 320, 330 ) for transmitting a first signal which is a signal for designating a signal outputted from the one charging apparatuses, to of the one charging apparatuses; a detecting device ( 320, 330 ) for detecting a third signal which is transmitted by wireless communication from the vehicle and which is a signal corresponding to a second signal which is a signal outputted from the one charging apparatus due to the transmitted first signal; and a distinguishing device ( 310 ) for correlating the one charging apparatus with the vehicle on the basis of the transmitted first signal and the detected third signal.

TECHNICAL FIELD

The present invention relates to a charging control apparatus andmethod, a charging system, a correlation method, and a computer program,which are configured to control wireless charging performed between avehicle which is provided with a secondary battery, and a chargingapparatus which is configured to charge the secondary battery.

BACKGROUND ART

As a charging system provided with this type of apparatus, for example,there is suggested a system which is provided with a charging stationfor charging a battery of a vehicle parked in a preset charging space ina wireless manner, and a service system server for collectively managingvehicle information of individual users registered in advance. Here inparticular, it is described that the charging station, the servicesystem server, and the system of the vehicle are connected to oneanother via a wireless communication network (refer to Patent document1).

Incidentally, there is also suggested a system which is provided with acharging stand having a plurality of chargers for supplying electricpower to the vehicle via charging cables (refer to Patent document 2).

PRIOR ART DOCUMENT Patent Document

-   Patent document 1: Japanese Patent Application Laid Open No.    2006-74868-   Patent document 2: Japanese Patent Application Laid Open No.    2010-178450

DISCLOSURE OF INVENTION Subject to be Solved by the Invention

The Patent document 1 does not disclose a method of checking whether ornot the vehicle is parked in the charging parking space of the chargingstation. If there are provided a plurality of charging apparatuses(corresponding to the charging stations in the Patent document 1), thereis a possibility that the charging apparatuses are not appropriatelycorrelated with the vehicle because the charging apparatuses and thevehicle are not directly connected, for example, via the charging cablesor the like, which is technically problematic.

In view of the aforementioned problems, it is therefore an object of thepresent invention to provide a charging control apparatus and method, acharging system, a correlation method, and a computer program, which areconfigured to appropriately correlate a charging apparatus, which isconfigured to charge a secondary battery installed in a vehicle in awireless manner, with the vehicle.

Means for Solving the Subject

The first charging control apparatus of the present invention is, inorder to solve the above-mentioned subject, a charging control apparatusfor controlling wireless charging between (i) one of a plurality ofcharging apparatuses which are configured to perform wireless chargingon a battery installed in a vehicle and (ii) the vehicle whichcommunicates with the one charging apparatus via a communication relayapparatus which is configured to relay communication between theplurality of charging apparatuses and the vehicle. The first chargingcontrol apparatus is provided with an outputting device for transmittinga first signal which is a signal for designating a signal outputted fromeach of the plurality of charging apparatuses, to each of the pluralityof charging apparatuses when the one charging apparatus and the vehicleare correlated; a detecting device for detecting a third signal which istransmitted by wireless communication from the vehicle and which is asignal corresponding to a second signal which is a signal outputted fromthe one charging apparatus due to the transmitted first signal when theone charging apparatus and the vehicle are correlated; and adistinguishing device for correlating the one charging apparatus withthe vehicle on the basis of the transmitted first signal and thedetected third signal when the one charging apparatus and the vehicleare correlated.

According to the first charging control apparatus of the presentinvention, the first charging control apparatus is a charging controlapparatus for controlling wireless charging between (i) one of aplurality of charging apparatuses and (ii) the vehicle. Here, the“wireless charging” shows a technology of wirelessly supplying electricpower and charging a battery. As specific types of the wirelesscharging, for example, there are an electromagnetic induction type, amicrowave wireless type (a radio reception type), a magnetic fieldcoupling resonance type, and the like. Incidentally, the details of thewireless charging correlate weakly with the subject matter of thepresent invention, and the explanation thereof will be thus omittedhere.

“Controlling the wireless charging” means receiving various signals suchas, for example, a charging voltage command value, an outputtablevoltage value, and a battery remaining capacity, and electronicallycontrolling various members such as, for example, a switch in a chargingcircuit, such that the wireless charging is appropriately performedbetween the charging apparatus and the vehicle.

Each of the plurality of charging apparatuses can charge, in a wirelessmanner, the battery such as, for example, a lithium ion battery and anickel hydrogen battery, which is installed in the vehicle such as, forexample, a hybrid vehicle and an electric vehicle, parked in apredetermined parking space.

The plurality of charging apparatuses and the vehicle are connected toeach other via the communication relay apparatus such as, for example,an access point. Particularly in the present invention, the vehicle andthe communication relay apparatus are connected by the wirelesscommunication. On the other hand, each of the plurality of chargingapparatuses and the communication relay apparatus may be connected bywired communication using, for example, an optical fiber cable, or maybe connected by the wireless communication.

According to the study of the present inventors, the following has beenfound; namely, in many cases, the charging apparatus is disposed in aparking lot, and the battery installed in the vehicle parked in theparking lot is charged by the disposed charging apparatus. In this case,in view of convenience of users, the plurality of charging apparatusesare desirably disposed in one parking lot having a plurality of parkingspaces. Moreover, if a wireless type charging apparatus is introduced,it is possible to reduce a working load of the user, such as, forexample, connecting a charging cable to the vehicle.

By the way, in the case of the wireless type charging apparatus, thecharging apparatus and the vehicle are connected typically by thewireless communication. If there are a plurality of chargingapparatuses, there is a possibility that correlation between thecharging apparatus and the vehicle (hereinafter referred to as“pairing”, as occasion demands) is not appropriately performed. There isalso considered a method in which a sensor such as, for example, apressure sensitive sensor, is disposed in the parking space and thepairing is performed on the basis of an output of the sensor; however,there is a possibility that installation cost of the chargingapparatuses is relatively expensive.

The first charging control apparatus of the present invention is thusprovided with the outputting device, the detecting device, and thedistinguishing device. The outputting device transmits the first signalwhich is a signal for designating a signal outputted from each of theplurality of charging apparatuses, to each of the plurality of chargingapparatuses when the one charging apparatus and the vehicle arecorrelated. Incidentally, the charging apparatus to which the firstsignal is transmitted is typically a charging apparatus which is notsubject to the pairing (i.e. which is not used).

The detecting device detects the third signal which is transmitted bythe wireless communication from the vehicle and which is a signalcorresponding to the second signal which is a signal outputted from theone charging apparatus due to the transmitted first signal. Here, the“second signal” is outputted directly to the vehicle from the onecharging apparatus without via the communication relay apparatus.

In the present invention, it is configured such that one of theplurality of charging apparatuses outputs to the vehicle the secondsignal which is a signal due to the first signal, if receiving the firstsignal transmitted from the outputting device. The vehicle is configuredto transmit to the first charging control apparatus the third signalwhich is a signal corresponding to the second signal, if receiving thesecond signal outputted from the one charging apparatus. Then, thedetecting device which constitutes the first charging control apparatusdetects the third signal transmitted from the vehicle.

The distinguishing device which is provided, for example, with a memory,a processor, a comparator, and the like, correlates the one chargingapparatus with the vehicle on the basis of the transmitted first signaland the detected third signal. Incidentally, which charging apparatusout of the plurality of charging apparatuses outputs the second signalto the vehicle may be specified (i) by changing timing in which thefirst signal is transmitted to each of the plurality of chargingapparatuses and in accordance with timing in which the third signal isdetected, or (ii) by changing a pattern of a signal transmitted as thefirst signal for each charging apparatus and in accordance with thedetected third signal.

As a result, according to the first charging control apparatus of thepresent invention, it is possible to appropriately perform the pairingbetween one of the plurality of charging apparatuses and the vehicle. Inaddition, since there is no need to provide some device only to performthe pairing between the one charging device and the vehicle, theinstallation cost of the charging apparatuses can be suppressed, whichis extremely useful in practice.

In one embodiment of the first charging control apparatus of the presentinvention, the outputting device transmits the first signal,sequentially at predetermined time intervals, to each of the pluralityof charging apparatuses.

According to this aspect, the one charging apparatus can be specified,relatively easily.

Alternatively, in other embodiment of the first charging controlapparatus of the present invention, the outputting device transmits aplurality of signals which correspond to the respective plurality ofcharging apparatuses and which have different patterns from each other,as the first signal, at a time, to each of the plurality of chargingapparatuses.

According to this aspect, the one charging apparatus can be specified,relatively easily.

The charging system of the present invention is provided with, in orderto solve the above-mentioned subject, a plurality of chargingapparatuses which are configured to perform wireless charging on abattery installed in a vehicle; and a communication relay apparatuswhich is configured to relay communication between the plurality ofcharging apparatuses and the vehicle, wherein. The communication relayapparatus transmits a first signal which is a signal for designating asignal outputted from each of the plurality of charging apparatuses, toeach of the plurality of charging apparatuses when one of the pluralityof charging apparatuses and the vehicle are correlated. Each of theplurality of charging apparatuses outputs a second signal which is asignal based on the transmitted first signal when one of the pluralityof charging apparatuses and the vehicle are correlated. Thecommunication relay apparatus (i) detects a third signal which istransmitted by wireless communication from the vehicle and which is asignal corresponding to the second signal outputted from the onecharging apparatus, and (ii) correlates the one charging apparatus withthe vehicle on the basis of the transmitted first signal and thedetected third signal when one of the plurality of charging apparatusesand the vehicle are correlated.

According to the charging system of the present invention, the chargingsystem is provided with the plurality of charging apparatuses and thecommunication relay apparatus. When one of the plurality of chargingapparatuses and the vehicle are correlated, the communication relayapparatus transmits the first signal which is a signal for designating asignal outputted from each of the plurality of charging apparatuses, toeach of the plurality of charging apparatuses. Each of the plurality ofcharging apparatuses which receives the transmitted first signal outputsto the vehicle the second signal which is a signal based on the firstsignal.

The communication relay apparatus (i) detects the third signal which istransmitted by the wireless communication from the vehicle, and (ii)correlates the one charging apparatus with the vehicle on the basis ofthe transmitted first signal and the detected third signal.Incidentally, the communication relay apparatus which constitutes thecharging system of the present invention corresponds to the firstcharging control apparatus of the present invention described above.

According to the charging system of the present invention, as in thefirst charging control apparatus of the present invention describedabove, it is possible to appropriately perform the pairing between oneof the plurality of charging apparatuses and the vehicle.

In one embodiment of the charging system of the present invention, eachof the plurality of charging apparatuses has a power supplying devicewhich is configured to supply electric power in a wireless manner to thebattery, and the power supplying device outputs a power pattern based onthe transmitted first signal, as the second signal.

According to this aspect, the second signal can be transmitted directlyto the vehicle from the one charging apparatus without via thecommunication relay apparatus.

In this embodiment, voltage of the electric pattern may lower thanvoltage when the wireless charging is performed on the battery.

By virtue of such a configuration, even if the second signal isoutputted from the charging apparatus corresponding to the parking spacein which the vehicle is not parked, it is possible to prevent defectsfrom occurring in the charging apparatus.

The second charging control apparatus of the present invention is, inorder to solve the above-mentioned subject, a charging control apparatusfor controlling wireless charging between (i) one of a plurality ofcharging apparatuses which are configured to perform wireless chargingon a battery installed in a vehicle and (ii) the vehicle whichcommunicates with the one charging apparatus via a communication relayapparatus which is configured to relay communication between theplurality of charging apparatuses and the vehicle. The charging controlapparatus is provided with a detecting device for detecting a secondsignal which is a signal outputted from the one charging apparatus dueto a first signal, the first signal being transmitted to each of theplurality of charging apparatuses from the communication relayapparatus, the first signal being a signal for designating a signaloutputted from each of the plurality of charging apparatuses when theone charging apparatus and the vehicle are correlated; and acommunicating device for transmitting a third signal which is a signalcorresponding to the detected second signal, to the communication relayapparatus by wireless communication such that the one charging apparatusand the vehicle are correlated, on the basis of the third signal and thetransmitted first signal, in the communication relay apparatus when theone charging apparatus and the vehicle are correlated.

According to the second charging control apparatus of the presentinvention, the detecting device detects the second signal which is asignal outputted from the one charging apparatus due to the firstsignal, the first signal being transmitted to each of the plurality ofcharging apparatuses from the communication relay apparatus when one ofthe plurality of charging apparatuses and the vehicle are correlated.

The communicating device transmits the third signal which is a signalcorresponding to the detected second signal, to the communication relayapparatus by the wireless communication such that the one chargingapparatus and the vehicle are correlated, on the basis of the thirdsignal and the transmitted first signal, in the communication relayapparatus.

As a result, the one charging apparatus and the vehicle are correlatedon the basis of the third signal and the first signal in thecommunication relay apparatus. Therefore, according to the secondcharging control apparatus of the present invention, it is possible toappropriately perform the pairing between one of the plurality ofcharging apparatuses and the vehicle.

The third charging control apparatus of the present invention is acharging control apparatus for controlling wireless charging between (i)one of a plurality of charging apparatuses which are configured toperform wireless charging on a battery installed in a vehicle and (ii)the vehicle which communicates with the one charging apparatus via acommunication relay apparatus which is configured to relay communicationbetween the plurality of charging apparatuses and the vehicle. Thecharging control apparatus is provided with a receiving device forreceiving a first signal corresponding to the one charging apparatus,out of first signals which are outputted from the communication relayapparatus and which are signals for designating signals outputted fromthe respective plurality of charging apparatuses when the one chargingapparatus and the vehicle are correlated; and an outputting device foroutputting a second signal which is a signal based on the received firstsignal, to the vehicle (i) such that the vehicle can transmit a thirdsignal which is a signal corresponding to the second signal, to thecommunication relay apparatus by wireless communication and (ii) suchthat the communication relay apparatus can correlate the one chargingapparatus with the vehicle on the basis of the transmitted first signaland the transmitted third signal when the one charging apparatus and thevehicle are correlated.

According to the third charging control apparatus of the presentinvention, the receiving device receives the first signal correspondingto the one charging apparatus, out of first signals which are outputtedfrom the communication relay apparatus and which are signals fordesignating signals outputted from the respective plurality of chargingapparatuses. In other words, the third charging control apparatus isinstalled in one charging apparatus.

The outputting device outputs the second signal which is a signal basedon the received first signal, to the vehicle (i) such that the vehiclecan transmit the third signal which is a signal corresponding to thesecond signal, to the communication relay apparatus by the wirelesscommunication and (ii) such that the communication relay apparatus cancorrelate the one charging apparatus with the vehicle on the basis ofthe transmitted first signal and the transmitted third signal.

As a result, the one charging apparatus and the vehicle are correlatedon the basis of the third signal and the first signal in thecommunication relay apparatus. Therefore, according to the thirdcharging control apparatus of the present invention, it is possible toappropriately perform the pairing between one of the plurality ofcharging apparatuses and the vehicle.

The charging control method of the present invention is, in order tosolve the above-mentioned subject, a charging control method ofcontrolling wireless charging between (i) one of a plurality of chargingapparatuses which are configured to perform wireless charging on abattery installed in a vehicle and (ii) the vehicle which communicateswith the one charging apparatus via a communication relay apparatuswhich is configured to relay communication between the plurality ofcharging apparatuses and the vehicle. The charging control method isprovided with an outputting process of transmitting a first signal whichis a signal for designating a signal outputted from each of theplurality of charging apparatuses, to each of the plurality of chargingapparatuses when the one charging apparatus and the vehicle arecorrelated; a detecting process of detecting a third signal which istransmitted by wireless communication from the vehicle and which is asignal corresponding to a second signal which is a signal outputted fromthe one charging apparatus due to the transmitted first signal when theone charging apparatus and the vehicle are correlated; and adistinguishing process of correlating the one charging apparatus withthe vehicle on the basis of the transmitted first signal and thedetected third signal when the one charging apparatus and the vehicleare correlated.

According to the charging control method of the present invention, as inthe first charging control apparatus of the present invention describedabove, it is possible to appropriately perform the pairing between oneof the plurality of charging apparatuses and the vehicle. Incidentally,even the charging control method of the present invention can adopt thesame various aspects as those of the first charging control apparatus ofthe present invention described above.

The first computer program of the present invention, in order to solvethe above-mentioned subject, makes a computer function as the firstcharging control apparatus of the present invention described above(including various embodiments thereof).

According to the first computer program of the present invention, thefirst charging control apparatus of the present invention describedabove can be relatively easily realized as the computer provided in thefirst charging control apparatus reads and executes the computer programfrom a recording medium for storing the computer program, such as acompact disc read only memory (CD-ROM) and a DVD read only memory(DVD-ROM), or as it executes the computer program after downloading theprogram through a communication device. By this, as in the firstcharging control apparatus of the present invention described above, itis possible to appropriately perform the pairing between one of theplurality of charging apparatuses and the vehicle.

The correlation method of the present invention is, in order to solvethe above-mentioned subject, a correlation method of correlating one ofa plurality of charging apparatuses with a vehicle in a charging systemcomprising: the plurality of charging apparatuses which are configuredto perform wireless charging on a battery installed in the vehicle; anda communication relay apparatus which is configured to relaycommunication between the plurality of charging apparatuses and thevehicle. The correlation method is provided with a first process inwhich the communication relay apparatus transmits a first signal whichis a signal for designating a signal outputted from each of theplurality of charging apparatuses, to each of the plurality of chargingapparatuses, a second process in which each of the plurality of chargingapparatuses outputs a second signal which is a signal based on thetransmitted first signal, and a third process in which the communicationrelay apparatus (i) detects a third signal which is transmitted bywireless communication from the vehicle and which is a signalcorresponding to the second signal outputted from the one chargingapparatus, and (ii) correlates the one charging apparatus with thevehicle on the basis of the transmitted first signal and the detectedthird signal.

According to the correlation method of the present invention, as in thecharging system of the present invention described above, it is possibleto appropriately perform the pairing between one of the plurality ofcharging apparatuses and the vehicle. Incidentally, even the correlationmethod of the present invention can adopt the same various aspects asthose of the charging system of the present invention described above.

The second computer program of the present invention, in order to solvethe above-mentioned subject, makes a computer function as the secondcharging control apparatus of the present invention described above.

According to the second computer program of the present invention, thesecond charging control apparatus of the present invention describedabove can be relatively easily realized as the computer provided in thesecond charging control apparatus reads and executes the computerprogram from a recording medium for storing the computer program, suchas a compact disc read only memory (CD-ROM) and a DVD read only memory(DVD-ROM), or as it executes the computer program after downloading theprogram through a communication device. By this, as in the secondcharging control apparatus of the present invention described above, itis possible to appropriately perform the pairing between one of theplurality of charging apparatuses and the vehicle.

The fourth charging control apparatus of the present invention is, inorder to solve the above-mentioned subject, a charging control apparatusfor controlling wireless charging between (i) one of a plurality ofcharging apparatuses which are configured to perform wireless chargingon a battery installed in a vehicle and (ii) the vehicle whichcommunicates with the one charging apparatus via a communication relayapparatus which is configured to relay communication between theplurality of charging apparatuses and the vehicle. The charging controlapparatus is provided with a communicating device for transmitting afirst signal which is a signal for designating a signal outputted fromeach of the plurality of charging apparatuses, to the communicationrelay apparatus by wireless communication such that the first signal istransmitted to each of the plurality of charging apparatuses from thecommunication relay apparatus when the one charging apparatus and thevehicle are correlated; a detecting device for detecting a second signalwhich is a signal outputted from the one charging apparatus, due to thefirst signal transmitted to each of the plurality of chargingapparatuses from the communication relay apparatus when the one chargingapparatus and the vehicle are correlated; and a distinguishing devicefor correlating the one charging apparatus with the vehicle on the basisof the transmitted first signal and the detected second signal when theone charging apparatus and the vehicle are correlated.

According to the fourth charging control apparatus of the presentinvention, the communicating device transmits the first signal which isa signal for designating a signal outputted from each of the pluralityof charging apparatuses, to the communication relay apparatus by thewireless communication such that the first signal is transmitted to eachof the plurality of charging apparatuses from the communication relayapparatus when one of the plurality of charging apparatuses and thevehicle are correlated.

In other words, the communicating device transmits the first signal toeach of the plurality of charging apparatuses via the communicationrelay apparatus. Incidentally, the communicating device transmits thefirst signal, typically, to each of the plurality of chargingapparatuses via the communication relay apparatus, sequentially atpredetermined time intervals.

The detecting device detects the second signal which is a signaloutputted from the one charging apparatus, due to the first signaltransmitted to each of the plurality of charging apparatuses from thecommunication relay apparatus. The distinguishing device, which isprovided, for example, with a memory, a processor, a comparator, and thelike, correlates the one charging apparatus with the vehicle on thebasis of the transmitted first signal and the detected second signal.

As a result, according to the fourth charging control apparatus of thepresent invention, it is possible to appropriately perform the pairingbetween one of the plurality of charging apparatuses and the vehicle.

The operation and other advantages of the present invention will becomemore apparent from embodiments explained below.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a conceptual diagram illustrating an entire configuration of acharging system in a first embodiment.

FIG. 2 is a block diagram illustrating the charging system in the firstembodiment.

FIG. 3 is a flowchart illustrating pairing processing (on a vehicleside) in the first embodiment.

FIG. 4 is a flowchart illustrating pairing processing (on a chargingsystem side) in the first embodiment.

FIG. 5 is a conceptual diagram illustrating one example of a powerpattern outputted from a charging infrastructure.

FIG. 6 is a flowchart illustrating pairing processing (on the vehicleside) in a second embodiment.

FIG. 7 is a flowchart illustrating pairing processing (on the chargingsystem side) in the second embodiment.

FIG. 8 is a conceptual diagram illustrating another example of the powerpattern outputted from the charging infrastructure.

MODES FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the charging system of the present inventionwill be explained on the basis of the drawings.

First Embodiment

A first embodiment of the charging system of the present invention willbe explained with reference to FIG. 1 to FIG. 5.

(Configuration of Charging System)

A configuration of the charging system in the first embodiment will beto explained with reference to FIG. 1 and FIG. 2. FIG. 1 is a conceptualdiagram illustrating an entire configuration of the charging system inthe first embodiment. FIG. 2 is a block diagram illustrating thecharging system in the first embodiment.

In FIG. 1, a charging system 1 constitutes one charging base (so-calledcharging stand) in a parking lot 100 such as, for example, parking lotsin buildings of companies and local governments, or parking lots inshopping centers. The charging system 1 is provided with a plurality ofcharging infrastructures 10 (hereinafter, referred to as “charginginfrastructures”, as occasion demands) and an access point (AP) 30.Incidentally, the “charging infrastructure 10” and the “access point 30”in the first embodiment are one example of the “charging apparatus” andthe “communication relay apparatus” of the present invention,respectively.

One charging infrastructure 10 is provided for one charging space 11(i.e. parking space). For the communication between each of the charginginfrastructures 10 and the access point 30, a wired communicationnetwork such as, for example, an optical fiber cable and a coaxial cableis used.

In FIG. 2, the charging infrastructure 10 is provided with a connectionmanagement unit 110, a packet generation/analysis unit 120, a packettransmission/reception unit 130, a power transmission control unit 140,a main circuit 150, and a coil 160.

A vehicle 20 such as, for example, an electric vehicle and a hybridvehicle is provided with a connection management unit 210, a packetgeneration/analysis unit 220, a packet transmission/reception unit 230,a charging control unit 240, a battery 250 such as, for example, alithium ion battery and a nickel hydrogen battery, and a coil 260.Incidentally, the “battery 250” of the present invention is one exampleof the “battery” of the present invention.

The access point 30 is provided with a connection management unit 310, apacket generation/analysis unit 320, and a packet transmission/receptionunit 330.

The charging infrastructure 10 is configured to supply the battery 250installed in the vehicle 20, with electric power in a wireless mannerfrom the exterior, for example, on the basis of a mutual in the coil 260induction effect of electromagnetic induction. Specifically, thecharging infrastructure 10 is configured such that electric power istransmitted from the coil 160 to the coil 260 because inducedelectromotive force is generated in the coil 260 due to magnetic fluxformation in the coil 160, between the coil 160 which is a coil on apower supply side (i.e. on the side of the charging infrastructure 10)and the coil 260 which is a coil on a charging side (i.e. on the side ofthe vehicle 20).

Incidentally, the distance between the coil 160 of the charginginfrastructure 10 and the coil 260 installed in the vehicle 20 uponpower supply is, for example, 10 to 25 cm (centimeters) or the like.

The power transmission control unit 140 of the charging infrastructure10 controls the main circuit, which is provided, for example, with aconverter, an inverter, a rectifier, a switch and the like, upon powersupply, such that appropriate magnetic flux is formed in the coil 160.The power transmission control unit 140 further transmits to theconnection management unit 110 information associated with charging suchas, for example, an outputtable voltage value, a current output voltagevalue, and a current charging current value (hereinafter referred to as“infrastructure-side charging control information”, as occasiondemands).

On the other hand, the charging control unit 240 of the vehicle 20controls the battery 250 and its surrounding circuits (not illustrated)or the like upon power supply, such that the battery 250 isappropriately charged. The charging control unit 240 further transmitsto the connection management unit 210 information associated withcharging such as, for example, a battery remaining capacity and acharging current command value (hereinafter referred to as “vehicle-sidecharging control information”, as occasion demands).

The connection management unit 110 of the charging infrastructure 10controls the packet generation/analysis unit 120 to packetize variouspieces of information including the infrastructure-side charging controlinformation and transmit it to the access point 30 via the packettransmission/reception unit 130. The connection management unit 110further controls the packet generation/analysis unit 120 to restore theoriginal information from packets received via the packettransmission/reception unit 130.

In the same manner, the connection management unit 210 of the vehicle 20controls the packet generation/analysis unit 220 to packetize variouspieces of information including the vehicle-side charging controlinformation and transmit it to the access point 30 via the packettransmission/reception unit 230. The connection management unit 210further controls the packet generation/analysis unit 220 to restore theoriginal information from packets received via the packettransmission/reception unit 230.

The connection management unit 310 of the access point 30 controls thepacket generation/analysis unit 320 to analyze packets received via thepacket transmission/reception unit 330. The connection management unit310 further controls the packet generation/analysis unit 320 to transmitthe packets to a predetermined determination (here, one of the pluralityof charging infrastructures 10 and a plurality of vehicles 20) based onan analysis result, via the packet transmission/reception unit 330.

The charging system 1 needs only one access point 30. Thus, installationcost can be reduced, for example, in comparison with a charging systemwhich is provided with the access point for each charginginfrastructure, and it is extremely useful in practice.

(Pairing Processing)

In the charging system 1 as configured above, the charginginfrastructure 10 and the charging space 11 are not provided with amember such as, for example, a sensor for recognizing the vehicle 20. Inaddition, the charging infrastructure 10 and the vehicle 20 alwayscommunicate with each other via the access point 30. Thus, in thecharging system 1, it is necessary to perform the pairing between thecharging infrastructure 10 and the vehicle 20 (in other words, torecognize which charging infrastructure 10 is used to park the vehicle20 in the charging space 11 corresponding to the charging infrastructure10) before charging the battery 250 installed in the vehicle 20.

Hereinafter, the paring processing in the first embodiment will beexplained with reference to flowcharts in FIG. 3 and FIG. 4, and FIG. 5.

In FIG. 3, firstly, if a switch (not illustrated) associated with thecharging of the battery 250 is pressed by a driver of the vehicle 20parked in one charging space 11, the connection management unit 210 ofthe vehicle 20 controls the packet generation/analysis unit 220 topacketize a signal indicating a pairing start command and transmit it tothe access point 30 (step S101).

Then, the connection management unit 210 controls the packetgeneration/analysis unit 220 to packetize a power pattern signal as oneexample of the “first signal” of the present invention, which is asignal for specifying a power pattern outputted from the charginginfrastructure 10, and transmit it to the access point 30 (step S102).Here, the “power pattern outputted from the charging infrastructure 10”means a power pattern of the induced electromotive force generated inthe coil 260 of the vehicle 20 due to the magnetic flux formed in thecoil 160 of the charging infrastructure 10.

Then, the connection management unit 210 of the vehicle 20 becomes in astand-by state until electric power is transmitted from one charginginfrastructure 10 due to the transmitted power pattern, or until someresponse is received from the access point 30 (step S103, S104).

On the other hand, in FIG. 4, if the connection management unit 310 ofthe access point 30 receives the signal indicating the paring startcommand transmitted from the vehicle 20 (step S201) and receives thetransmitted power pattern signal (step S202), then, the connectionmanagement unit 310 controls the packet generation/analysis unit 320 topacketize the received power pattern signal and transmit it to onecharging infrastructure 10 corresponding to one unused charging space 11out of a plurality of charging spaces 11 (step S203).

Then, the connection management unit 310 becomes in the stand-by stateuntil some response is received from the vehicle 20 (step S204).

The connection management unit 110 of one charging infrastructure 10which receives the power pattern signal transmitted in the processing inthe step S203 transmits the received power pattern signal to thecharging control unit 140. The charging control unit 140 controls themain circuit 150 such that the magnetic flux is formed in the coil 160in accordance with the power pattern indicated by the transmitted powerpattern signal.

If the charging infrastructure 10 corresponding to the charging space 11in which the vehicle 20 which transmits the power pattern signal in theprocessing in the step S102 (refer to FIG. 3) is parked is the charginginfrastructure 10 which receives the power pattern signal transmittedfrom the access point 30, then, the induced electromotive force isgenerated in the coil 260 of the vehicle 20, and electric power issupplied from the charging infrastructure 10 to the vehicle 20.

Incidentally, the pattern of the electric power supplied to the vehicle20 (i.e. the pattern according to the power pattern signal) is, forexample, as illustrated in FIG. 5. Here, a voltage value is set to belower than a voltage value in normal power supply, so that an intenseelectric field is not formed in the charging space 11 in a non-loadstate (i.e. in which the vehicle 20 is not parked). FIG. 5 is aconceptual diagram illustrating one example of the power patternoutputted from the charging infrastructure.

On the other hand, if the charging infrastructure 10 corresponding tothe charging space 11 in which the vehicle 20 which transmits the powerpattern signal is parked is not the charging infrastructure 10 whichreceives the power pattern signal transmitted from the access point 30,then, the induced electromotive force is not generated in the coil 260of the vehicle 20 (i.e. electric power is not supplied).

Back in FIG. 3 again, the connection management unit 210 of the vehicle20 determines whether or not a signal indicating pairing failure isreceived at a time point after a lapse of predetermined time (e.g. 20seconds, etc.) after it becomes in the standby state (i.e. at a timepoint of timeout), at a time point at which the generation of theinduced electromotive force in the coil 260 is detected, or at a timepoint at which some signal is received (step S105).

If it is determined that the signal indicating the pairing failure isreceived (the step S105: Yes), the connection management unit 210transmits a signal indicating a charging stop to the charging controlunit 240 and displays an error message, for example, on a monitordisposed in an instrumental panel (not illustrated) of the vehicle 20(and/or issues an alarm from a speaker).

If it is determined that the signal indicating the pairing failure isnot received (the step S105: No), the connection management unit 210determines whether or not some power pattern is detected (i.e. whetheror not the induced electromotive force is generated in the coil 260)(step S106).

If it is determined that the power pattern is not detected (i.e. thatthe induced electromotive force is not generated in the coil 260) (thestep S106: No), it is considered that the charging infrastructure 10 towhich the power pattern signal is transmitted in the processing in thestep S203 (refer to FIG. 4) is not the charging infrastructure 10corresponding to the caring space 11 in which the vehicle 20 is parked,and thus, the connection management unit 210 controls the packetgeneration/analysis unit 220 to packetize the signal indicating thepairing failure and transmit it to the access point 30 (step S109) andbecomes in the stand-by state again.

If it is determined that the power pattern, as one example of the“second signal” of the present invention, is detected (the step S106:Yes), the connection management unit 210 compares the power patternindicated by the power pattern signal transmitted in the processing inthe step S102, with the detected power pattern. Then, the connectionmanagement unit 210 determines whether or not the designated powerpattern is detected (i.e. whether or not the power pattern indicated bythe power pattern signal transmitted in the processing in the step S102matches the detected power pattern) (step S107).

If it is determined that the designated power pattern is not detected(the step S107: No), the connection management unit 210 controls thepacket generation/analysis unit 220 to packetize a signal indicating apairing retry and transmit it to the access point 30 (step S110) andbecomes in the stand-by state again.

If it is determined that the designated power pattern is detected (thestep S107: Yes), the connection management unit 210 controls the packetgeneration/analysis unit 220 to packetize a signal indicating pairingsuccess and transmit it to the access point 30 (step S108) and transmitsa signal indicating a charging start to the charging control unit 240.

Back in FIG. 4 again, the connection management unit 310 of the accesspoint 30 determines whether or not some signal is received at a timepoint after a lapse of predetermined time (e.g. 60 seconds, etc.) afterit becomes in the standby state (i.e. at a time point of timeout), or ata time point at which some signal is received from the vehicle 20 whichtransmits the signal indicating the pairing start command received inthe processing in the step S201 (step S205). Incidentally, whether ornot the signal is from the vehicle 20 which transmits the signalindicating the pairing start command may be determined, for example,with reference to packet transmission source ID (Identification Data) orthe like.

If it is determined that the signal is not received (the step S205: No),the connection management unit 310 controls the packetgeneration/analysis unit 320 to packetize the signal indicating thecharging stop and transmit it to the charging infrastructure 10 whichtransmits the power pattern signal in the processing in the step S203.

If it is determined that the signal is received (the step S205: Yes),the connection management unit 310 determines whether or not thereceived signal is the signal indicating the pairing success (stepS206). If it is determined that the signal indicating the pairingsuccess is received (the step S206: Yes), the connection management unit310 controls the packet generation/analysis unit 320 to packetize asignal indicating the reception of the signal indicating the pairingsuccess and transmit it to the vehicle 20 (step S207), and controlspacket generation/analysis unit 320 to packetize the signal indicatingthe charging start and transmit it to the charging infrastructure 10which receives the power pattern signal in the processing in the stepS203.

If it is determined that the received signal is not the signalindicating the pairing success is received (the step S206: No), theconnection management unit 310 determines whether or not the receivedsignal is the signal indicating the pairing retry (step S208). If it isdetermined that the received signal is the signal indicating the pairingretry (the step S208: Yes), the connection management unit 310 controlsthe packet generation/analysis unit 320 to packetize the power patternsignal again and transmit it to the charging infrastructure 10 whichtransmits the power pattern signal in the previous time.

If it is determined that the received signal is not the signalindicating the pairing retry (the step S208: No), the connectionmanagement unit 310 determines whether or not there is the charginginfrastructure 10 which corresponds to the unused charging space 11 outof the plurality of charging spaces 11 and to which the power patternsignal has not been transmitted yet (step S209).

If it is determined that there is the charging infrastructure 10 whichcorresponds to the unused charging space 11 and to which the powerpattern signal has not been transmitted yet (the step S209: Yes), theconnection management unit 310 controls the packet generation/analysisunit 320 to packetize the power pattern and transmit it to one charginginfrastructure 10, out of the charging infrastructures 10, whichcorresponds to the unused charging space 11 and to which the powerpattern signal has not been transmitted yet (step S211).

If it is determined that there is no charging infrastructure 10 thatcorresponds to the unused charging space 11 and to which the powerpattern signal has not been transmitted yet (the step S209: No), theconnection management unit 310 controls the packet generation/analysisunit 320 to packetize the signal indicating the pairing failure andtransmit it to the vehicle 20 (step S210), and controls the packetgeneration/analysis unit 320 to packetize the signal indicating thecharging start and transmit it to the charging infrastructure 10 whichtransmits the power pattern signal in the processing in the step S203.

The “connection management unit 210”, the “packet generation/analysisunit 220”, the “packet transmission/reception unit 230”, and the “coil260” in the first embodiment are one example of the “fourth chargingcontrol apparatus” of the present invention. The “connection managementunit 210” and the “coil 260” in the first embodiment are one example ofthe “distinguishing device” and the “detecting device” of the “fourthcharging control apparatus” of the present invention, respectively. The“packet generation/analysis unit 220” and the “packettransmission/reception unit 230” in the first embodiment are one exampleof the “communicating device” of the “fourth charging control apparatus”of the present invention.

Second Embodiment

A second embodiment of the charging system of the present invention willbe explained with reference to FIG. 6 to FIG. 8. Incidentally, thesecond embodiment has the same configuration as that of the firstembodiment, except that the pairing processing is different. Thus, inthe second embodiment, the explanation that overlaps with the firstembodiment will be omitted, and common portions on the drawings willcarry the same reference numerals. Basically, only different points willbe explained with reference to FIG. 6 to FIG. 8.

(Paring Processing)

In a flowchart in FIG. 6, firstly, if a switch (not illustrated)associated with the charging of the battery 250 is pressed down by thedriver of the vehicle 20 parked in one charging space 11, the connectionmanagement unit 210 of the vehicle 20 controls the packetgeneration/analysis unit 220 to packetize the signal indicating thepairing start command and transmit it to the access point 30 (stepS301).

Then, the connection management unit 210 of the vehicle 20 becomes inthe stand-by state until electric power is transmitted from one charginginfrastructure 10, or until some response is received from the accesspoint 30 (step S302, S303).

On the other hand, in a flowchart in FIG. 7, if the connectionmanagement unit 310 of the access point 30 receives the signalindicating the paring start command transmitted from the vehicle 20(step S401), then, the connection management unit 310 controls thepacket generation/analysis unit 320 to packetize power pattern signalsas another example of the “first signal” of the present invention andtransmit them to respective charging infrastructures 10 corresponding tounused charging spaces 11 out of the plurality of charging spaces,wherein the power pattern signals are signals for specifying powerpatterns outputted from the respective charging infrastructure 10 andhaving different patterns from each other (step S402).

Incidentally, the connection management unit 310 may transmit theelectric pattern signals to the respective charging infrastructures 10,(i) sequentially at predetermined time intervals, or (ii) at a time.

Then, the connection management unit 310 becomes in the stand-by stateuntil some response is received from the vehicle 20 (step S403).

The connection management unit 110 of each of the charginginfrastructures 10 which receive the power pattern signals transmittedin the step S402 described above transmits the received power patternsignal to the charging control unit 140. The charging control unit 140controls the main circuit 150 such that magnetic flux according to thepower pattern indicated by the transmitted power pattern signal, forexample, as illustrated in FIG. 8, is formed in the coil 160.

FIG. 8 is a conceptual diagram illustrating another example of the powerpattern outputted from the charging infrastructure, in the same conceptas that of FIG. 5. A power pattern signal illustrated in Pattern 1 inFIG. 8 is transmitted to one charging infrastructure 10 out of theplurality of charging infrastructures 10, and a power pattern signalillustrated in Pattern 2 in FIG. 8 is transmitted to another charginginfrastructure 10. Thus, the charging infrastructure 10 corresponding tothe vehicle 20 can be specified from the power pattern detected in thevehicle 20.

Back in FIG. 6 again, the connection management unit 210 of the vehicle20 determines whether or not some power pattern is detected at a timepoint after a lapse of predetermined time after it becomes in thestandby state, at a time point at which the generation of the inducedelectromotive force in the coil 260 is detected, or at a time point atwhich some signal is received (step S304).

If it is determined that the power pattern is not detected (the stepS304: No), the connection management unit 210 controls the packetgeneration/analysis unit 220 to packetize the signal indicating thepairing failure and transmit it to the access point 30 (step S306), andtransmits the signal indicating the charging stop to the chargingcontrol unit 240.

If it is determined that the power pattern is detected (the step S304:Yes), the connection management unit 210 controls the packetgeneration/analysis unit 220 to packetize a signal indicating thedetected power pattern as one example of the “third signal” of thepresent invention and transmit it to the access point 30 (step S305),and transmits the signal indicating the charging start to the chargingcontrol unit 240.

Back in FIG. 7 again, the connection management unit 310 of the accesspoint 30 determines whether or not the signal is received at a timepoint after at a time point after a lapse of predetermined time after itbecomes in the standby state, or at a time point at which some signal isreceived from the vehicle 20 which transmits the signal indicating thepairing start command received in the processing in the step S201 (stepS404).

If it is determined that the signal is received (the step S404: Yes),the connection management unit 310 determines whether or not the pairingis successful (i.e. whether or not there is a signal corresponding tothe signal indicating the power pattern transmitted in the processing inthe step S305 (refer to FIG. 6), among the power pattern signalstransmitted in the processing in the step S402 (step S405).

If it is determined that the pairing is successful (the step S405: Yes),the connection management unit 310 controls the packetgeneration/analysis unit 320 to packetize the signal indicating thepairing success and transmit it to the vehicle 20 (step S406), andcontrols the packet generation/analysis unit 320 to packetize the signalindicating the charging start and transmit it to the charginginfrastructure 10 which transmits, in the processing in the step S402,the power pattern signal corresponding to the signal indicating powerpattern transmitted in the processing in the step S305.

If it is determined in the processing in the step S404 that the signalis not received (the step S404; No), or if it is determined in theprocessing in the step S405 that the pairing is failed (the step S405;No), then, the connection management unit 310 controls the packetgeneration/analysis unit 320 to packetize the signal indicating thepairing failure and transmit it to the vehicle 20 (step S407), andcontrols the packet generation/analysis unit 320 to packetize the signalindicating the charging stop and transmit it to all the charginginfrastructures 10 that transmit the power pattern signals in theprocessing in the step S402.

The “connection management unit 310”, the “packet generation/analysisunit 320”, and the “packet transmission/reception unit 330” in thesecond embodiment are one example of the “first charging controlapparatus” of the present invention. The “connection management unit310” in the second embodiment is one example of the “distinguishingdevice” of the “first charging control apparatus” of the presentinvention. The “packet generation/analysis unit 320” and the “packettransmission/reception unit 330” in the second embodiment are oneexample of the “outputting device” and the “detecting device” of the“first charging control apparatus” of the present invention.

The “packet generation/analysis unit 220”, and the “packettransmission/reception unit 230” and the “coil 260” in the secondembodiment are one example of the “second charging control apparatus” ofthe present invention. The “coil 260” in the second embodiment is oneexample of the “detecting device” of the “second charging controlapparatus” of the present invention. The “connection management unit210”, the “packet generation/analysis unit 220”, and the “packettransmission/reception unit 230” in the second embodiment are oneexample of the “communicating device” of the “second charging controlapparatus” of the present invention.

The “packet generation/analysis unit 120”, the “packettransmission/reception unit 130”, the “power transmission control unit140”, the “main circuit 150”, and the “coil 160” in the secondembodiment are one example of the “third charging control apparatus” ofthe present invention. The “packet generation/analysis unit 120” and the“packet transmission/reception unit 130” are one example of the“receiving device” of the “third charging control apparatus” of thepresent invention. The “power transmission control unit 140”, the “maincircuit 150”, and the “coil 160” in the second embodiment are oneexample of the “outputting device” of the “third charging controlapparatus” of the present invention.

Incidentally, as the charging system 1 in the embodiments describedabove, the charging system of an electromagnetic induction type islisted. The present invention, however, is not limited to the chargingsystem of the electromagnetic induction type, and can be applied to asystem which adopts various wireless charging methods, such as, forexample, of a radio reception type and of a magnetic field couplingresonance type. Specifically, for example, if the charging system of theradio reception type is adopted as the charging system 1 in theembodiments described above, the “coil 160” and the “coil 260” in theembodiments may be interpreted as “antennas”.

The present invention is not limited to the aforementioned embodiments,but various changes may be made, if desired, without departing from theessence or spirit of the invention which can be read from the claims andthe entire specification. A charging control apparatus and method, acharging system, a correlation method, and a computer program, whichinvolve such changes, are also intended to be within the technical scopeof the present invention.

DESCRIPTION OF REFERENCE CODES

-   1 charging system-   10 charging infrastructure-   11 charging space-   20 vehicle-   30 access point-   100 parking lot-   110, 210, 310 connection management unit-   120, 220, 320 packet generation/analysis unit-   130, 230, 330 packet transmission/reception unit-   140 power transmission control unit-   150 main circuit-   160, 260 coil-   240 charging control unit-   250 battery

1. A charging control apparatus for controlling a plurality of chargingapparatuses, each of the charging apparatuses being configured to becapable of supplying electric power to a vehicle through a predeterminedpower supplying path, wherein the charging control apparatus isconfigured to perform pairing between the vehicle and one of theplurality of charging apparatuses based on a signal outputted from thevehicle which detects a first electric power having predetermined powerpattern, the first electric power is supplied from the one of theplurality of charging apparatuses via the predetermined power supplyingpath.
 2. A charging control apparatus mounted on a vehicle to which eachof a plurality of charging apparatuses supplies electric power through apredetermined power supplying path, wherein the charging controlapparatus is configured to output signal, which is used to performpairing between the vehicle and one of the plurality of chargingapparatuses, based on a detection result of a first electric powerhaving predetermined power pattern, the first electric power is suppliedfrom the one of the plurality of charging apparatuses via thepredetermined power supplying path.
 3. A charging control apparatusmounted on one of a plurality of charging apparatuses, each of theplurality of charging apparatuses being configured to be capable ofsupplying electric power to a vehicle through a predetermined powersupplying path, wherein the charging control apparatus is configured tosupply a first electric power having predetermined power pattern to thevehicle such that pairing between the vehicle and the one of theplurality of charging apparatuses is performed based on a signaloutputted from the vehicle which detects the first electric power. 4.The charging control apparatus according to claim 1, wherein thepredetermined power supplying path is a path which is used to supplysecond electric power for charging a battery of the vehicle.
 5. Thecharging control apparatus according to claim 2, wherein thepredetermined power supplying path is a path which is used to supplysecond electric power for charging a battery of the vehicle.
 6. Thecharging control apparatus according to claim 3, wherein thepredetermined power supplying path is a path which is used to supplysecond electric power for charging a battery of the vehicle.
 5. Acharging system comprising: a plurality of charging apparatuses each ofwhich is configured to be capable of supplying electric power to avehicle through a predetermined power supplying path; and a singlecommunication relay apparatus which is configured to be capable ofrelaying communication between the plurality of charging apparatuses andthe vehicle, wherein the communication relay apparatus is configured toperform pairing between the vehicle and one of the plurality of chargingapparatuses based on a signal outputted from the vehicle which detects afirst electric power having predetermined power pattern, the firstelectric power is supplied from the one of the plurality of chargingapparatuses via the predetermined power supplying path.
 6. A chargingcontrol method of controlling a plurality of charging apparatuses, eachof the charging apparatuses being configured to be capable of supplyingelectric power to a vehicle through a predetermined power supplyingpath, wherein the charging control method performs pairing between thevehicle and one of the plurality of charging apparatuses based on asignal outputted from the vehicle which detects a first electric powerhaving predetermined power pattern, the first electric power is suppliedfrom the one of the plurality of charging apparatuses via thepredetermined power supplying path.
 7. A non-transitory computerreadable recording medium recording thereon a computer program, whereinthe computer program makes a computer function as the charging controlapparatus according to claim 1.